Question

If for every 2 atoms of Chlorine-35 there are 5 atoms of Chlorine-38. What is the average mass?

Answer 1

37.1

Step-by-step explanation:

mass of 2 atoms of chlorine-35 = 2× 35 = 70

mass of 5 atoms of chlorine-38 = 5 × 38 = 190

average mass = total mass / total number of atoms

= (70 +190) / (2 +5)

= 260 / 7

= 37.143

= 37.1